Pulp Dissolver Sensor Control for Contaminant Rope Stability
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Solution Overview
Problem
Current pulper control systems are inadequate in responding to fluctuating contaminant content in recycled fiber materials, leading to disruptions in reject removal and increased wear on pulper components.
Innovation Solution
The implementation of radar and imaging sensors to detect surface contours and vibrations in the pulper, allowing for real-time adjustment of paper supply and removal speed to maintain consistent contaminant removal, thereby preventing rope breakage and jamming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual control of ragger rope speed is used, then operational simplicity is maintained, but response adequacy to contaminant fluctuations deteriorates
Solution Approach 1:
The patent replaces manual mechanical control of the ragger rope speed with an automated sensor-based control system. Sensors detect surface contours and vibrations in the pulper, and this information is used to automatically adjust the ragger rope speed, eliminating the need for manual intervention while ensuring adequate response to contaminant fluctuations.
2Reliability
If automated sensor control is implemented, then response adequacy to contaminant fluctuations improves, but device complexity increases
Solution Approach 1:
The patent introduces sensors as intermediary devices that detect surface contours and vibrations in the pulper. These sensors act as mediators between the physical state of the contaminant rope and the control system, providing indirect but effective measurement without requiring direct contact with the contaminant rope itself.
3Device complexity
If ragger rope speed is not adjusted, then device complexity is minimized, but reject removal effectiveness deteriorates
Solution Approach 1:
The patent implements dynamic adjustment of the ragger rope speed based on real-time detection of surface contours and vibrations. The system transitions from a static, fixed-speed operation to a dynamic, adaptive operation where the speed is continuously adjusted to match the varying contaminant load, thereby maintaining effective reject removal.
4Stability of the object's composition
If early detection of contaminant load is implemented, then reject removal uniformity improves, but device complexity increases
Solution Approach 1:
The patent implements preliminary detection of contaminant load by monitoring surface contours and vibrations in the pulper before the contaminant rope is fully formed. This early detection allows the system to take preventive action by adjusting the ragger rope speed in advance, ensuring uniform reject removal and preventing rope breakage or jamming.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables more precise and consistent removal of contaminants, reducing pulper malfunctions and extending the lifespan of equipment by maintaining uniform contaminant rope thickness and density.
Implementation Method 1
a first sensor, in particular a radar sensor (43), is provided for detecting a surface contour (42)
Implementation Method 2
a second sensor, in particular a vibration sensor (61), is provided for detecting movements, in particular vibration amplitude and/or vibration frequency, of the contaminant rope (53)
Data Source
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AI summary
The invention relates to a pulp dissolver for shredding and suspending paper pulp, an arrangement comprising a pulp dissolver, and a method for operating the pulp dissolver. The invention includes a sensor for detecting surface structure. Based on the detected surface structure, conclusions can be drawn about the suspension formed in the pulp dissolver. This makes it possible to influence the formation of contaminants at an early stage.